Formula: Ca2B4O7(Cl,OH)2 . 2H2O
Origin of name: For Ekaterine V. Rozhkova, Russian mineralogist
Crystal system: Hexagonal
Crystal class: 6
Twinning:
Unit cell:
Colour: White
Diaphaneity:
Luster: Pearly
Habit: Crystals, hexagonal, tiny in foliated aggregates
Hardness: ~1
Specific gravity: 2.44
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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